Gyro Sensor Function - Mazda RX-8 2004 Service Highlights

3G 3E
3H
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GYRO SENSOR FUNCTION

• The gyro sensor is located in the navigation unit. The sensor converts yaw rate, which is one of the inputs used
in calculating the vehicle's direction of travel from the vehicle's cornering angle, into electrical signals. It then
sends these signals to the navigation unit.
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GYRO SENSOR CONSTRUCTION/OPERATION
• A piezoelectric type (utilizes the piezoelectric effect) gyro sensor is used. It is composed of three piezoelectric
transducers, a drive transducer and two pick-ups, used to drive and sense the vibrations of the triangular pillar.
Both parts are installed on each surface of the triangle pillar. Piezoelectric transducer can either be distorted by
electrical voltage, or can create electrical voltage by being distorted. The gyro sensor uses both characteristics
of the piezoelectric material.
PICK-UP (LEFT)
DRIVE TRANSDUCER
• One face of the triangular pillar functions as the driving side, the others function as pick-up sides. Electrically
induced vibration of the drive transducer causes the pick-up sides to vibrate, and the pick-up sides produce an
electrical current.
ENTERTAINMENT
Terminal
3C 3A
3F 3D 3B
Terminal
4A
PICK-UP (RIGHT)
8-pin connector (for extended function)
3A
3B
3C
3D
3E
3F
3G
3H
1-pin connector
4A GPS antenna input
PICK-UP (LEFT)
Signals
–
Serial output
–
Serial input
Power
Reset
B+
GND
Signal
CHU092066902S03
CHU092066902S04
TRIANGULAR PILLAR
PICK-UP (RIGHT)
DRIVE TRANSDUCER
CHU0920S107
09–20–19
09–20